Is there binaries I can install or do I need to compile something? I have no idea where the code is.
If you are running Arch you already have it [1].
[0] https://packages.debian.org/experimental/xorg-server-source [1] https://archlinux.org/packages/extra/x86_64/xorg-server/
Wayland touchpad gesture implementation in Qt widget framework has been released in version 6.2.0
X11 touchpad gesture implementation in Gtk widget framework has been released in version 4.5.0
X11 touchpad gesture implementation it Qt widget framework will be released in version 6.3.0 (March 2022)
Touchpad gesture implementation for XWayland will be released in version 22.1 (early 2022)